kVA to Amps Formula [Single, Two, Three Phase]

kVA to amps formula is used to convert kilovolt amps in single, two, and three-phase AC circuits.

kVA or kilovolt-ampere is defined as the amount of volt times current which is begin fed to the load. The term is often associated with the alternating current (ac) circuits and has no role in dc circuits.  kVA is the apparent power which is supplied to the load. Three formulas to calculate kVA from current can be used for doing calculations of kVA’s from amps.

Single phase kVA to Amps

It is the ratio of thousand times kVA to the voltage at any system.

Example 1: A 2 kV AC Power supply supplies power to the load whose apparent power rating is 200 kVA. Find the current.

Solution: I = [200 * 1000] / 2000 = 100 Amps

Two-phase kVA to Amps

It is the ratio of thousand times kVA to 2 times voltage (due to two-phase).

Example 2: A 5 kV power system has the apparent power ratings of 300 kVA. Find the amperes that are passing through it.

Solution: I = [300 * 1000] / 2 * 5000 = 30 Amps

Three Phase kVA to Amps

It is the ratio of thousand times kVA to 1.73 times of system voltages. The number 1.73 is an approximation for √3. Where  √3 = 1.732

Example 3: The kVA of an 18 kV circuit is 500. Find the current flowing through it.

Solution: I = [500 * 1000] / 1.73 * 18,000 = 160 Amps

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